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Message-ID: <20221116161230.GA1113864@bhelgaas>
Date: Wed, 16 Nov 2022 10:12:30 -0600
From: Bjorn Helgaas <helgaas@...nel.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Marc Zyngier <maz@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jason Gunthorpe <jgg@...lanox.com>,
Dave Jiang <dave.jiang@...el.com>,
Alex Williamson <alex.williamson@...hat.com>,
Kevin Tian <kevin.tian@...el.com>,
Dan Williams <dan.j.williams@...el.com>,
Logan Gunthorpe <logang@...tatee.com>,
Ashok Raj <ashok.raj@...el.com>, Jon Mason <jdmason@...zu.us>,
Allen Hubbe <allenbh@...il.com>,
Michael Ellerman <mpe@...erman.id.au>,
Christophe Leroy <christophe.leroy@...roup.eu>,
linuxppc-dev@...ts.ozlabs.org,
"Ahmed S. Darwish" <darwi@...utronix.de>,
Reinette Chatre <reinette.chatre@...el.com>
Subject: Re: [patch 15/39] PCI/MSI: Get rid of PCI_MSI_IRQ_DOMAIN
On Fri, Nov 11, 2022 at 02:54:38PM +0100, Thomas Gleixner wrote:
> What a zoo:
>
> PCI_MSI
> select GENERIC_MSI_IRQ
>
> PCI_MSI_IRQ_DOMAIN
> def_bool y
> depends on PCI_MSI
> select GENERIC_MSI_IRQ_DOMAIN
>
> Ergo PCI_MSI enables PCI_MSI_IRQ_DOMAIN which in turn selects
> GENERIC_MSI_IRQ_DOMAIN. So all the dependencies on PCI_MSI_IRQ_DOMAIN are
> just an indirection to PCI_MSI.
>
> Match the reality and just admit that PCI_MSI requires
> GENERIC_MSI_IRQ_DOMAIN.
>
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>
Just FYI, this will conflict with my work-in-progress to add more
COMPILE_TEST coverage:
https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git/commit/?id=72b5e7c401a1
No *actual* conflicts, just textually next door, so should be sipmle
to resolve. Worst case I can postpone my patch until the next cycle.
> ---
> arch/um/drivers/Kconfig | 1
> arch/um/include/asm/pci.h | 2 -
> arch/x86/Kconfig | 1
> arch/x86/include/asm/pci.h | 4 +-
> drivers/pci/Kconfig | 8 +----
> drivers/pci/controller/Kconfig | 30 +++++++++-----------
> drivers/pci/controller/dwc/Kconfig | 48 ++++++++++++++++----------------
> drivers/pci/controller/mobiveil/Kconfig | 6 ++--
> drivers/pci/msi/Makefile | 2 -
> drivers/pci/probe.c | 2 -
> include/linux/msi.h | 32 ++++++---------------
> 11 files changed, 56 insertions(+), 80 deletions(-)
>
> --- a/arch/um/drivers/Kconfig
> +++ b/arch/um/drivers/Kconfig
> @@ -381,7 +381,6 @@ config UML_PCI_OVER_VIRTIO
> select UML_IOMEM_EMULATION
> select UML_DMA_EMULATION
> select PCI_MSI
> - select PCI_MSI_IRQ_DOMAIN
> select PCI_LOCKLESS_CONFIG
>
> config UML_PCI_OVER_VIRTIO_DEVICE_ID
> --- a/arch/um/include/asm/pci.h
> +++ b/arch/um/include/asm/pci.h
> @@ -7,7 +7,7 @@
> /* Generic PCI */
> #include <asm-generic/pci.h>
>
> -#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
> +#ifdef CONFIG_PCI_MSI
> /*
> * This is a bit of an annoying hack, and it assumes we only have
> * the virt-pci (if anything). Which is true, but still.
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1109,7 +1109,6 @@ config X86_LOCAL_APIC
> def_bool y
> depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI
> select IRQ_DOMAIN_HIERARCHY
> - select PCI_MSI_IRQ_DOMAIN if PCI_MSI
>
> config X86_IO_APIC
> def_bool y
> --- a/arch/x86/include/asm/pci.h
> +++ b/arch/x86/include/asm/pci.h
> @@ -21,7 +21,7 @@ struct pci_sysdata {
> #ifdef CONFIG_X86_64
> void *iommu; /* IOMMU private data */
> #endif
> -#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
> +#ifdef CONFIG_PCI_MSI
> void *fwnode; /* IRQ domain for MSI assignment */
> #endif
> #if IS_ENABLED(CONFIG_VMD)
> @@ -52,7 +52,7 @@ static inline int pci_proc_domain(struct
> }
> #endif
>
> -#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
> +#ifdef CONFIG_PCI_MSI
> static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
> {
> return to_pci_sysdata(bus)->fwnode;
> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -38,6 +38,7 @@ source "drivers/pci/pcie/Kconfig"
>
> config PCI_MSI
> bool "Message Signaled Interrupts (MSI and MSI-X)"
> + select GENERIC_MSI_IRQ_DOMAIN
> select GENERIC_MSI_IRQ
> help
> This allows device drivers to enable MSI (Message Signaled
> @@ -51,11 +52,6 @@ config PCI_MSI
>
> If you don't know what to do here, say Y.
>
> -config PCI_MSI_IRQ_DOMAIN
> - def_bool y
> - depends on PCI_MSI
> - select GENERIC_MSI_IRQ_DOMAIN
> -
> config PCI_MSI_ARCH_FALLBACKS
> bool
>
> @@ -192,7 +188,7 @@ config PCI_LABEL
>
> config PCI_HYPERV
> tristate "Hyper-V PCI Frontend"
> - depends on ((X86 && X86_64) || ARM64) && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && SYSFS
> + depends on ((X86 && X86_64) || ARM64) && HYPERV && PCI_MSI && SYSFS
> select PCI_HYPERV_INTERFACE
> help
> The PCI device frontend driver allows the kernel to import arbitrary
> --- a/drivers/pci/controller/Kconfig
> +++ b/drivers/pci/controller/Kconfig
> @@ -19,7 +19,7 @@ config PCI_AARDVARK
> tristate "Aardvark PCIe controller"
> depends on (ARCH_MVEBU && ARM64) || COMPILE_TEST
> depends on OF
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCI_BRIDGE_EMUL
> help
> Add support for Aardvark 64bit PCIe Host Controller. This
> @@ -29,7 +29,7 @@ config PCI_AARDVARK
> config PCIE_XILINX_NWL
> bool "NWL PCIe Core"
> depends on ARCH_ZYNQMP || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> help
> Say 'Y' here if you want kernel support for Xilinx
> NWL PCIe controller. The controller can act as Root Port
> @@ -53,7 +53,7 @@ config PCI_IXP4XX
> config PCI_TEGRA
> bool "NVIDIA Tegra PCIe controller"
> depends on ARCH_TEGRA || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> help
> Say Y here if you want support for the PCIe host controller found
> on NVIDIA Tegra SoCs.
> @@ -70,7 +70,7 @@ config PCI_RCAR_GEN2
> config PCIE_RCAR_HOST
> bool "Renesas R-Car PCIe host controller"
> depends on ARCH_RENESAS || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> help
> Say Y here if you want PCIe controller support on R-Car SoCs in host
> mode.
> @@ -99,7 +99,7 @@ config PCI_HOST_GENERIC
> config PCIE_XILINX
> bool "Xilinx AXI PCIe host bridge support"
> depends on OF || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> help
> Say 'Y' here if you want kernel to support the Xilinx AXI PCIe
> Host Bridge driver.
> @@ -124,7 +124,7 @@ config PCI_XGENE
> config PCI_XGENE_MSI
> bool "X-Gene v1 PCIe MSI feature"
> depends on PCI_XGENE
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> default y
> help
> Say Y here if you want PCIe MSI support for the APM X-Gene v1 SoC.
> @@ -170,7 +170,7 @@ config PCIE_IPROC_BCMA
> config PCIE_IPROC_MSI
> bool "Broadcom iProc PCIe MSI support"
> depends on PCIE_IPROC_PLATFORM || PCIE_IPROC_BCMA
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> default ARCH_BCM_IPROC
> help
> Say Y here if you want to enable MSI support for Broadcom's iProc
> @@ -186,7 +186,7 @@ config PCIE_ALTERA
> config PCIE_ALTERA_MSI
> tristate "Altera PCIe MSI feature"
> depends on PCIE_ALTERA
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> help
> Say Y here if you want PCIe MSI support for the Altera FPGA.
> This MSI driver supports Altera MSI to GIC controller IP.
> @@ -215,7 +215,7 @@ config PCIE_ROCKCHIP_HOST
> tristate "Rockchip PCIe host controller"
> depends on ARCH_ROCKCHIP || COMPILE_TEST
> depends on OF
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select MFD_SYSCON
> select PCIE_ROCKCHIP
> help
> @@ -239,7 +239,7 @@ config PCIE_MEDIATEK
> tristate "MediaTek PCIe controller"
> depends on ARCH_AIROHA || ARCH_MEDIATEK || COMPILE_TEST
> depends on OF
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> help
> Say Y here if you want to enable PCIe controller support on
> MediaTek SoCs.
> @@ -247,7 +247,7 @@ config PCIE_MEDIATEK
> config PCIE_MEDIATEK_GEN3
> tristate "MediaTek Gen3 PCIe controller"
> depends on ARCH_MEDIATEK || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> help
> Adds support for PCIe Gen3 MAC controller for MediaTek SoCs.
> This PCIe controller is compatible with Gen3, Gen2 and Gen1 speed,
> @@ -277,7 +277,7 @@ config PCIE_BRCMSTB
> depends on ARCH_BRCMSTB || ARCH_BCM2835 || ARCH_BCMBCA || \
> BMIPS_GENERIC || COMPILE_TEST
> depends on OF
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> default ARCH_BRCMSTB || BMIPS_GENERIC
> help
> Say Y here to enable PCIe host controller support for
> @@ -285,7 +285,7 @@ config PCIE_BRCMSTB
>
> config PCI_HYPERV_INTERFACE
> tristate "Hyper-V PCI Interface"
> - depends on ((X86 && X86_64) || ARM64) && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN
> + depends on ((X86 && X86_64) || ARM64) && HYPERV && PCI_MSI && PCI_MSI
> help
> The Hyper-V PCI Interface is a helper driver allows other drivers to
> have a common interface with the Hyper-V PCI frontend driver.
> @@ -303,8 +303,6 @@ config PCI_LOONGSON
> config PCIE_MICROCHIP_HOST
> bool "Microchip AXI PCIe host bridge support"
> depends on PCI_MSI && OF
> - select PCI_MSI_IRQ_DOMAIN
> - select GENERIC_MSI_IRQ_DOMAIN
> select PCI_HOST_COMMON
> help
> Say Y here if you want kernel to support the Microchip AXI PCIe
> @@ -326,7 +324,7 @@ config PCIE_APPLE
> tristate "Apple PCIe controller"
> depends on ARCH_APPLE || COMPILE_TEST
> depends on OF
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCI_HOST_COMMON
> help
> Say Y here if you want to enable PCIe controller support on Apple
> --- a/drivers/pci/controller/dwc/Kconfig
> +++ b/drivers/pci/controller/dwc/Kconfig
> @@ -21,7 +21,7 @@ config PCI_DRA7XX_HOST
> tristate "TI DRA7xx PCIe controller Host Mode"
> depends on SOC_DRA7XX || COMPILE_TEST
> depends on OF && HAS_IOMEM && TI_PIPE3
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select PCI_DRA7XX
> default y if SOC_DRA7XX
> @@ -53,7 +53,7 @@ config PCIE_DW_PLAT
>
> config PCIE_DW_PLAT_HOST
> bool "Platform bus based DesignWare PCIe Controller - Host mode"
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select PCIE_DW_PLAT
> help
> @@ -67,7 +67,7 @@ config PCIE_DW_PLAT_HOST
>
> config PCIE_DW_PLAT_EP
> bool "Platform bus based DesignWare PCIe Controller - Endpoint mode"
> - depends on PCI && PCI_MSI_IRQ_DOMAIN
> + depends on PCI && PCI_MSI
> depends on PCI_ENDPOINT
> select PCIE_DW_EP
> select PCIE_DW_PLAT
> @@ -83,7 +83,7 @@ config PCIE_DW_PLAT_EP
> config PCI_EXYNOS
> tristate "Samsung Exynos PCIe controller"
> depends on ARCH_EXYNOS || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> help
> Enables support for the PCIe controller in the Samsung Exynos SoCs
> @@ -94,13 +94,13 @@ config PCI_EXYNOS
> config PCI_IMX6
> bool "Freescale i.MX6/7/8 PCIe controller"
> depends on ARCH_MXC || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
>
> config PCIE_SPEAR13XX
> bool "STMicroelectronics SPEAr PCIe controller"
> depends on ARCH_SPEAR13XX || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> help
> Say Y here if you want PCIe support on SPEAr13XX SoCs.
> @@ -111,7 +111,7 @@ config PCI_KEYSTONE
> config PCI_KEYSTONE_HOST
> bool "PCI Keystone Host Mode"
> depends on ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select PCI_KEYSTONE
> help
> @@ -135,7 +135,7 @@ config PCI_KEYSTONE_EP
> config PCI_LAYERSCAPE
> bool "Freescale Layerscape PCIe controller - Host mode"
> depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select MFD_SYSCON
> help
> @@ -160,7 +160,7 @@ config PCI_LAYERSCAPE_EP
> config PCI_HISI
> depends on OF && (ARM64 || COMPILE_TEST)
> bool "HiSilicon Hip05 and Hip06 SoCs PCIe controllers"
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select PCI_HOST_COMMON
> help
> @@ -170,7 +170,7 @@ config PCI_HISI
> config PCIE_QCOM
> bool "Qualcomm PCIe controller"
> depends on OF && (ARCH_QCOM || COMPILE_TEST)
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select CRC8
> help
> @@ -191,7 +191,7 @@ config PCIE_QCOM_EP
> config PCIE_ARMADA_8K
> bool "Marvell Armada-8K PCIe controller"
> depends on ARCH_MVEBU || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> help
> Say Y here if you want to enable PCIe controller support on
> @@ -205,7 +205,7 @@ config PCIE_ARTPEC6
> config PCIE_ARTPEC6_HOST
> bool "Axis ARTPEC-6 PCIe controller Host Mode"
> depends on MACH_ARTPEC6 || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select PCIE_ARTPEC6
> help
> @@ -226,7 +226,7 @@ config PCIE_ROCKCHIP_DW_HOST
> bool "Rockchip DesignWare PCIe controller"
> select PCIE_DW
> select PCIE_DW_HOST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> depends on ARCH_ROCKCHIP || COMPILE_TEST
> depends on OF
> help
> @@ -236,7 +236,7 @@ config PCIE_ROCKCHIP_DW_HOST
> config PCIE_INTEL_GW
> bool "Intel Gateway PCIe host controller support"
> depends on OF && (X86 || COMPILE_TEST)
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> help
> Say 'Y' here to enable PCIe Host controller support on Intel
> @@ -250,7 +250,7 @@ config PCIE_KEEMBAY
> config PCIE_KEEMBAY_HOST
> bool "Intel Keem Bay PCIe controller - Host mode"
> depends on ARCH_KEEMBAY || COMPILE_TEST
> - depends on PCI && PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select PCIE_KEEMBAY
> help
> @@ -262,7 +262,7 @@ config PCIE_KEEMBAY_HOST
> config PCIE_KEEMBAY_EP
> bool "Intel Keem Bay PCIe controller - Endpoint mode"
> depends on ARCH_KEEMBAY || COMPILE_TEST
> - depends on PCI && PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> depends on PCI_ENDPOINT
> select PCIE_DW_EP
> select PCIE_KEEMBAY
> @@ -275,7 +275,7 @@ config PCIE_KEEMBAY_EP
> config PCIE_KIRIN
> depends on OF && (ARM64 || COMPILE_TEST)
> tristate "HiSilicon Kirin series SoCs PCIe controllers"
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> help
> Say Y here if you want PCIe controller support
> @@ -284,7 +284,7 @@ config PCIE_KIRIN
> config PCIE_HISI_STB
> bool "HiSilicon STB SoCs PCIe controllers"
> depends on ARCH_HISI || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> help
> Say Y here if you want PCIe controller support on HiSilicon STB SoCs
> @@ -292,7 +292,7 @@ config PCIE_HISI_STB
> config PCI_MESON
> tristate "MESON PCIe controller"
> default m if ARCH_MESON
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> help
> Say Y here if you want to enable PCI controller support on Amlogic
> @@ -306,7 +306,7 @@ config PCIE_TEGRA194
> config PCIE_TEGRA194_HOST
> tristate "NVIDIA Tegra194 (and later) PCIe controller - Host Mode"
> depends on ARCH_TEGRA_194_SOC || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select PHY_TEGRA194_P2U
> select PCIE_TEGRA194
> @@ -336,7 +336,7 @@ config PCIE_TEGRA194_EP
> config PCIE_VISCONTI_HOST
> bool "Toshiba Visconti PCIe controllers"
> depends on ARCH_VISCONTI || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> help
> Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
> @@ -346,7 +346,7 @@ config PCIE_UNIPHIER
> bool "Socionext UniPhier PCIe host controllers"
> depends on ARCH_UNIPHIER || COMPILE_TEST
> depends on OF && HAS_IOMEM
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> help
> Say Y here if you want PCIe host controller support on UniPhier SoCs.
> @@ -365,7 +365,7 @@ config PCIE_UNIPHIER_EP
> config PCIE_AL
> bool "Amazon Annapurna Labs PCIe controller"
> depends on OF && (ARM64 || COMPILE_TEST)
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_DW_HOST
> select PCI_ECAM
> help
> @@ -377,7 +377,7 @@ config PCIE_AL
>
> config PCIE_FU740
> bool "SiFive FU740 PCIe host controller"
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> depends on SOC_SIFIVE || COMPILE_TEST
> select PCIE_DW_HOST
> help
> --- a/drivers/pci/controller/mobiveil/Kconfig
> +++ b/drivers/pci/controller/mobiveil/Kconfig
> @@ -8,14 +8,14 @@ config PCIE_MOBIVEIL
>
> config PCIE_MOBIVEIL_HOST
> bool
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_MOBIVEIL
>
> config PCIE_MOBIVEIL_PLAT
> bool "Mobiveil AXI PCIe controller"
> depends on ARCH_ZYNQMP || COMPILE_TEST
> depends on OF
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_MOBIVEIL_HOST
> help
> Say Y here if you want to enable support for the Mobiveil AXI PCIe
> @@ -25,7 +25,7 @@ config PCIE_MOBIVEIL_PLAT
> config PCIE_LAYERSCAPE_GEN4
> bool "Freescale Layerscape PCIe Gen4 controller"
> depends on ARCH_LAYERSCAPE || COMPILE_TEST
> - depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_MSI
> select PCIE_MOBIVEIL_HOST
> help
> Say Y here if you want PCIe Gen4 controller support on
> --- a/drivers/pci/msi/Makefile
> +++ b/drivers/pci/msi/Makefile
> @@ -3,5 +3,5 @@
> # Makefile for the PCI/MSI
> obj-$(CONFIG_PCI) += pcidev_msi.o
> obj-$(CONFIG_PCI_MSI) += msi.o
> -obj-$(CONFIG_PCI_MSI_IRQ_DOMAIN) += irqdomain.o
> +obj-$(CONFIG_PCI_MSI) += irqdomain.o
> obj-$(CONFIG_PCI_MSI_ARCH_FALLBACKS) += legacy.o
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -842,7 +842,6 @@ static struct irq_domain *pci_host_bridg
> if (!d)
> d = pci_host_bridge_acpi_msi_domain(bus);
>
> -#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
> /*
> * If no IRQ domain was found via the OF tree, try looking it up
> * directly through the fwnode_handle.
> @@ -854,7 +853,6 @@ static struct irq_domain *pci_host_bridg
> d = irq_find_matching_fwnode(fwnode,
> DOMAIN_BUS_PCI_MSI);
> }
> -#endif
>
> return d;
> }
> --- a/include/linux/msi.h
> +++ b/include/linux/msi.h
> @@ -238,15 +238,6 @@ static inline void msi_desc_set_iommu_co
> }
> #endif
>
> -#ifdef CONFIG_PCI_MSI
> -struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc);
> -void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);
> -#else /* CONFIG_PCI_MSI */
> -static inline void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg)
> -{
> -}
> -#endif /* CONFIG_PCI_MSI */
> -
> int msi_add_msi_desc(struct device *dev, struct msi_desc *init_desc);
> void msi_free_msi_descs_range(struct device *dev, unsigned int first_index, unsigned int last_index);
>
> @@ -259,12 +250,6 @@ static inline void msi_free_msi_descs(st
> msi_free_msi_descs_range(dev, 0, MSI_MAX_INDEX);
> }
>
> -void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
> -void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
> -
> -void pci_msi_mask_irq(struct irq_data *data);
> -void pci_msi_unmask_irq(struct irq_data *data);
> -
> /*
> * The arch hooks to setup up msi irqs. Default functions are implemented
> * as weak symbols so that they /can/ be overriden by architecture specific
> @@ -466,20 +451,21 @@ int platform_msi_device_domain_alloc(str
> void platform_msi_device_domain_free(struct irq_domain *domain, unsigned int virq,
> unsigned int nvec);
> void *platform_msi_get_host_data(struct irq_domain *domain);
> -#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
>
> -#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
> +/* PCI specific interfaces */
> +struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc);
> +void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);
> +void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
> +void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
> +void pci_msi_mask_irq(struct irq_data *data);
> +void pci_msi_unmask_irq(struct irq_data *data);
> struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
> struct msi_domain_info *info,
> struct irq_domain *parent);
> u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev);
> struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev);
> bool pci_dev_has_special_msi_domain(struct pci_dev *pdev);
> -#else
> -static inline struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev)
> -{
> - return NULL;
> -}
> -#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */
> +
> +#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
>
> #endif /* LINUX_MSI_H */
>
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